package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import net.bytebuddy.implementation.bytecode.Throw;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;


@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;


    /**
     * 新增菜品对应的口味数据
     * @param dishDTO
     */
    @Transactional
    public void savaWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        // 保存菜品数据到菜品表dish
        dishMapper.insert(dish);
        //获取insert语句获取的生成的主键值
        long dishId = dish.getId();
        //口味表还要插入n条数据
        List<DishFlavor> flavors  = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            flavors.forEach((dishFlavor -> {
                dishFlavor.setDishId(dishId);
            }));
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);

        }
    }

    /**
     * 根据id查询菜品
     * @param
     * @return
     */


    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

   /**
     * 批量删除菜品
     * @param ids
     */
   @Transactional
    public void deleteById(List<Long> ids) {
        //判断菜品能否删除 是否存在起售中的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){
                //当前菜品处于起售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //是否被套餐关联?
        List<Long> setmealIds =setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds != null && setmealIds.size() > 0){
            //当前菜品被关联了不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的菜表数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //删除菜品中相关联的口味数据
//            dishFlavorMapper.deleteByDishId(id);
//        }
        //delete from dish_flavor where dish_id in (?,?,?)
       //更具菜品id集合删除菜单中的数据
       dishMapper.deleteByIds(ids);
       //根据菜单id删除菜单中的口味数据
       dishFlavorMapper.deleteByDishIds(ids);
    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //根据菜品id查询口味数据
       List<DishFlavor> dishFlavors =  dishFlavorMapper.getByDishId(id);
        //将查询的数据封装到VO中
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品表的基本信息
        dishMapper.update(dish);
        //删除原有的口味信息
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入新的口味信息
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            flavors.forEach((dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            }));
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }
    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        dishMapper.updateStatus(status,id);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavors(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
